In the Key Mapping Entry dialog box, click the "Presses this key:" radio button and enter 2 in the field. Check the "Perform ...

In the Key Mapping Entry dialog box, click the "Presses this key:" radio button and enter 2 in the field. Check the "Perform this additional action:" checkbox and select the "Run auto attendant" radio button choosing the "Browse" button to select the select the second-level auto attendant. Click "OK" to save the mapping for the 2 key.
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